Pick and like hand tool



Jan. 6.1925. 1,522,029

B. B. ROBERTS PI CK AND LIKE HAND TOOL Filed Sept. 19, 1924 MH IIJ I. MN y Patented Jan. 6, 1925.

BRERETON BURGESS ROBERTS, OF HEATH, WALES, ASSIGNOR TO JOSEPH WALTER/S,

tantra earner orries.

0F HEATH, WALES.

PICK AND LIKE HAND TOOL.

To all whom it may concern Be it known that I, Bnnanron' BunonssRonnnrs, of Park House, Cimla, Neath, in the county of Glamo'rga-n,VVa-les, a subject of the King of Great Britain and Ireland, haveinvented Improvements Relating to Picks and like Hand Tools (for which Ihave filed an application in Great Britain,

No. 18,432, filed the 17th July, 1923), of which the following is aspecification.

Thisinvention relates to hand tools such as picks, axes, adzes, hammers,rakes, hoes, shovels or the like, of the kind wherein a metal head orblade is detachably and yet firmly secured to av handle or shaft by avpair of plates in combination with clamping sleeve around said plates.

The object of such a provision is to enable the head, blade or the liketo be readily attached and detached, whether for substitution of anotherhead, blade or tool of the same or different kind, or for easy carriageor storage or other purpose. For instance, a coal miner changes his pickblade for a sharp blade after it has become blunt, and he takes severalsharp blades with him into the mine in readiness for this purpose. Forconvenience my invention will be described herein as applied to a pickofa size and general well known type, but it will be evident that myinvention. can be extended to other purposes also, such as gardenimplements for example. My invention therefore consists of certainimprovements which aim at carrying out the aforesaid objects in a moreconvenient, reliable and expeditious manner than heretofore.

Reference will be made to the accompanying sheet of drawings,illustrating a convenient form of my invention, as applied to a minerspick.

In the drawings herewith, Fig. 1 shows a general assembly in perspectiveof a. pick and means for ataching the same to a handle, Fig. 2 shows theformation of the centre section of the pick, Fig. 3 is a partsectionalelevation of the end of the handle showing the parts separated, Fig. 4is a vertical sectionon line 48 of Fig. 1. Fig. 5 is an end elevation,the blade being in section.

Referring to Figs. 1, 2, 4 and 5, the blade 1 is formed with a reducedand wedgeshaped centre section 1 Side plates 2 and 3 (seen in section inFig. 3) which are clamped upon opposite sides of the handle 4 at oneend, and are suitably curved to accommodate themselves to the handle,and to hold the blade 1 in place by engaging the reduced centre-section1 of the tool. One of the plates, for example 2. has a pin 5 projectingfrom it and riveted thereto, and the handle 4 has a hole in a suitableposition to receive the said pin 5. The opposite plate 3 is providedwith a hole 6 in the right position to engage the protruding end of thepin 5, which therefore serve to locate the two plates 2, 3 upon thehandle 4. The whole device is wedged in place by a malleable cast steelcollar 7, which is slightly tapered internally, the same being slippedon the handle 4 and slid along until it embraces the two plates'2, 3.The size and shape ofthis collar 7 is carefully chosen to make the wholefitting rigid and strong. It is necessary that it shall be a closeworking fit, requiring to be forced upon the plates 2, 3, while thelatter are gripping the centre section 1 of the blade 1 and the end ofthe handle 4: between them, and it is these plates 2, 3, which hold theblade 1 to the handle 4. This hold is further increased by providing atone end of the collar 7 two opposite recesses 8 to accommodate the blade1 thus tending to hold it still more firmly, by pressing together theends of the plates 2, 3 with the blade between them.

The ends of the plates 2, 3 are provided with a flange or rim 9 whichprojects outward at a right angle to overlie the centre section 1 of theblade.

The centre section 1 of the pick or tool is of such size that itsshoulders will be engaged by the plates 2, 3, and is taperedtransversely, as is seen in the drawings. The sufaces 2 3 of plates 3,where they grip centre 1 are correspondingly inclined. Virtuallytherefore, the formation ofthe section 1 provides a recessed portion onblade 1 which is engaged by the projecting parts of the members 2, 3.The plates 2, 3 are of course exteriorly formed so as to be snuglyengaged by the collar 7 which by virtue of the taper, jams theplatestightly on both blade 1 andhandle 4. The collar 7 may be lightened byapertures such as 7* (Fig. 3).

It will be realized that the pin 5, whilst probably contributing to thesecurity of the device has its chief function in positioning section andthe plates 2, 3, on the handle 4; which is provided with an aperture forthe passage therethrough of the pin 5.

In order to lessen the diliiculty of fitting the section 1 of the pickor tool with the clamps :2 and 3, the flanges 9 and 10, have their sides2 and 3 inclined, which insures a snug fit when the members 2 and 8 areforced together by the sleeve.

1 claim l. A tool handle fastening comprising a handle having atransverse bore adjacent to its end a pair of complementary handle andtool embracing members, one of said members having a pin attachedthereto the opposite member being apertured to receive an end of saidpin, said members having tool engaging jaws which are movable towardeach other, said jaws having inward extending shoulders and sidewallswhich are tapered in a direction opposite to an external tapered portionof the sections, a clamping sleeve having at one end recesses to admitof said sleeve being forced beyond the tool engaging recesses of thecomplementary members, and outward extending flanges on opposite ends ofthe sleeve.

2. Means for securing a tool to a handle, said tool having a centralportion with converging side walls and angular shoulders a pair of tooland handle engaging members provided with tool embracing recesses, meansfor holding one of said members in positive engagement with. a handle,and a clamping sleeve provided with recesses which admit of the sleevebeing forced upon the clamping members to extend beyond the inner faceof the tool.

3. The herein described means for securing the head of a pick or liketool having a reduced beveled portion and shoulders to a handle, ofcomplementary handle and tool engaging sections, means for holding saidsections in non-slidable engagement with a handle, said sections havingportions which extend beyond the end of the handle to embrace thereduced portion of the tool, and a slidable clamping sleeve whichembraces the complementary sections to force the same toward each otherwhen moved toward the tool. the parts being of such construction that aportion of the sleeve will overlie the sides and lower edge of the tool.

In witness whereof I have signed this specification.

BRERETON BURGESS ROBERTS.

